Nanoscale field emission in inert gas under atmospheric pressure

被引：9
作者：
Qian, Li
Wang, Yuquan
Liu, Liang [1 ]
Fan, Shoushan
机构：
[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
来源：
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 2010年 / 28卷 / 03期
关键词：
atomic force microscopy; carbon nanotubes; cathodes; current fluctuations; electron field emission; helium; nanofabrication; WALLED CARBON NANOTUBES;
D O I：
10.1116/1.3372333
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Stable field emission has been obtained in inert gas under atmospheric pressure with 100 nm characteristic size. An individual multiwalled carbon nanotube (MWCNT) mounted on an atomic force microscopy tip acted as the cathode. The field emitter could provide current of up to 1 mu A with fluctuation lower than 6%. This MWCNT was then coated with HfC to further improve its field emission current by about four times and reduce the fluctuation to 2%. With the protection of HfC, the field emitter has a high stability under atmospheric pressure inert gas; even increasing the characteristic size to 200 nm does not affect the stability. These results, combined with the state-of-the-art fabrication technology, could help create nanoscale field emission devices. (C) 2010 American Vacuum Society. [DOI: 10.1116/1.3372333]
引用
收藏
页码：562 / 566
页数：5
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